Xyleborinus thaiphami
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Xyleborinus thaiphami holotype lateral; R.K. Osborn |
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Xyleborinus thaiphami holotype dorsal; R.K. Osborn |
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Xyleborinus thaiphami holotype declivity; R.K. Osborn |
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Xyleborinus thaiphami holotype frontal; R.K. Osborn |
Taxonomic history
Xyleborinus thaiphami Smith, Beaver & Cognato 2020 (in Smith et al. 2020bSmith et al. 2020b:
Smith SM, Beaver RA, and Cognato AI. 2020b. A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China. ZooKeys 983: 1-442. https://doi.org/10.3897/zookeys.983.52630): 357.
Diagnosis
2.8−2.9 mm long (mean = 2.86 mm; n = 5); 2.9−3.11 times as long as wide. This species is distinguished by the declivitaldeclivital:
pertaining to the elytral declivity
face with interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br />
impressed and bear smaller punctures.
2 armed by granulesgranule:
a small rounded protuberance, like grains of sand
at declivitaldeclivital:
pertaining to the elytral declivity
summit (1−3 large denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base
present in Vietnamese specimens), unarmed on declivitaldeclivital:
pertaining to the elytral declivity
face; declivitaldeclivital:
pertaining to the elytral declivity
interstriae 3 denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base larger than those of interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br />
impressed and bear smaller punctures.
1, pointed, spine-like; denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base on interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br />
impressed and bear smaller punctures.
5 large, sharply pointed, spine-like; discaldiscal:
pertaining to the disc of either the pronotum or elytra
interstriae 1 and 2 unarmed; declivitaldeclivital:
pertaining to the elytral declivity
interstriae 2 flattened; and large size.
This species is nearly identical to Xyleborinus attenuatus and can be distinguished by the declivitaldeclivital:
pertaining to the elytral declivity
interstriae 3 denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base which are acutely pointed rather than incurved, and interstriaeinterstria:
longitudinal spaces along the elytra between the striae, which is not as<br />
impressed and bear smaller punctures.
5 denticlesdenticle:
a small tooth, the sides of which are equal and the tip is above the middle of the base never down-curved.
May be confused with
Xyleborinus attenuatus, X. saxesenii, X. subgranulatus, and X. subspinosus
Distribution
China (Chongqing, Guizhou, Sichuan, Yunnan), Myanmar, Vietnam
Host plants
known from Pinus armandi (Pinaceae) and Juglans regia (Juglandaceae) (Smith et al. 2020bSmith et al. 2020b:
Smith SM, Beaver RA, and Cognato AI. 2020b. A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China. ZooKeys 983: 1-442. https://doi.org/10.3897/zookeys.983.52630)
DNA data
Sequences available for COI and CAD.
